PIAA is the number one brand in Mercedes S63 aftermarket High Beam Headlight Bulbs and for good reason. Their long history of producing the most reliable and best performing High beam bulbs in the market has been untouched by other competitors. These PIAA Xtreme White Plus Mercedes S63 High Beam Head Light Bulbs are using the newest technology available, and producing only the best Xtreme White Plus coatings, these PIAA Xtreme White Plus Bulbs are the best upgrade for your Mercedes S63's Halogen High Beam Headlight system.